How,does availability of water affect the distribution of population? Or How does water supply affect population density?

How,does availability of water affect the distribution of population?�

1.	How,does availability of water affect the distribution of population? Or How does water supply affect population density?
Answer» Water is the most important factor for life. People give priority to get settled in such regions where water is easily available. Water is an element with multiple uses. Water is used for drinking, washing, bathing, preparing food, and for animals, crops, industries and boating. This is the reason that due to the availability of water, river valley regions are the most densely populated areas of the world. World’s ancient civilisations – Nile Valley Civilisation, Indus Valley Civilisation and Mesopotamia Civilisation had developed on the banks of rivers.